大约有 43,134 项符合查询结果（耗时：0.0481秒） [XML]
Why is XOR the default way to combine hashes?
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119
Assuming uniformly random (1-bit) inputs, the AND function output probability distribution is ...
Is there a ceiling equivalent of // operator in Python?
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edited Sep 14 at 21:47
Machavity♦
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Convert Rows to columns using 'Pivot' in SQL Server
...nt] int
);
INSERT INTO #yt
(
[Store],
[Week], [xCount]
)
VALUES
(102, 1, 96),
(101, 1, 138),
(105, 1, 37),
(109, 1, 59),
(101, 2, 282),
(102, 2, 212),
(105, 2, 78),
(109, 2, 97),
(105, 3, 60),
(102, 3, 123),
(101, 3, 220),
(109, 3, 87);
If your...
Non greedy (reluctant) regex matching in sed?
...egex for this context is pretty easy to get:
perl -pe 's|(http://.*?/).*|\1|'
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How to split the name string in mysql?
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16 Answers
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Pandas get topmost n records within each group
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195
Did you try df.groupby('id').head(2)
Ouput generated:
>>> df.groupby('id').head(2)...
python dataframe pandas drop column using int
I understand that to drop a column you use df.drop('column name', axis=1). Is there a way to drop a column using a numerical index instead of the column name?
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How to convert a boolean array to an int array
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176
Numpy arrays have an astype method. Just do y.astype(int).
Note that it might not even be ne...
Pointers in Python?
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answered Jun 24 '10 at 5:58
Alex MartelliAlex Martelli
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Rank items in an array using Python/NumPy, without sorting array twice
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